Add deprecated dependency and mark all relevant classes as deprecated

Author: absurdfarce

cassandra/io/eventletreactor.py

@@ -24,6 +24,7 @@
 import logging
 from threading import Event
 import time
+from deprecated import deprecated
 
 from cassandra.connection import Connection, ConnectionShutdown, Timer, TimerManager
 try:
@@ -45,6 +46,7 @@ def _check_pyopenssl():
         )
 
 
+@deprecated(version="3.30.0", reason="The eventlet event loop is deprecated and will be removed in 3.31.0.  See CASSPYTHON-12.")
 class EventletConnection(Connection):
     """
     An implementation of :class:`.Connection` that utilizes ``eventlet``.

cassandra/io/geventreactor.py

@@ -19,16 +19,15 @@
 from gevent import socket
 import gevent.ssl
 
+from deprecated import deprecated
 import logging
 import time
 
-
 from cassandra.connection import Connection, ConnectionShutdown, Timer, TimerManager
 
-
 log = logging.getLogger(__name__)
 
-
+@deprecated(version="3.30.0", reason="The gevent event loop is deprecated and will be removed in 3.31.0.  See CASSPYTHON-12.")
 class GeventConnection(Connection):
     """
     An implementation of :class:`.Connection` that utilizes ``gevent``.

cassandra/io/twistedreactor.py

@@ -18,6 +18,7 @@
 ( https://twistedmatrix.com ).
 """
 import atexit
+from deprecated import deprecated
 import logging
 import time
 from functools import partial
@@ -180,7 +181,7 @@ def clientConnectionForTLS(self, tlsProtocol):
             connection.set_tlsext_host_name(self.ssl_options['server_hostname'].encode('ascii'))
         return connection
 
-
+@deprecated(version="3.30.0", reason="The Twisted event loop is deprecated and will be removed in 3.31.0.  See CASSPYTHON-12.")
 class TwistedConnection(Connection):
     """
     An implementation of :class:`.Connection` that utilizes the

pyproject.toml

@@ -6,7 +6,7 @@ requires = ["setuptools", "Cython>=3.0", "tomli"]
 name = "cassandra-driver"
 description = "Apache Cassandra Python Driver"
 version = "3.30.0"
-dependencies = ['geomet>=1.1']
+dependencies = ['geomet>=1.1', "Deprecated"]
 readme = "README.rst"
 authors = [{name = "DataStax"}]
 license = "Apache-2.0"